Why don't they just make a rimless version?

>>31821400
it's called 7.62x51 and russia uses it too

they just have too much shit that still uses x54r so they keep it around

Because why fix what isn't broken.
They got both automatics and beltfeds that can feed it, even if it's rimmed.

>>31821400
to keep it from going too far up your ass faggot

>>31821400
Why don't they just rim your asshole faggot

>>31821400
for what purpose?

I like my bullets rimmed for my extractor's pleasure, if you catch my drift

>>31822135
the rim limits the cartridge's use, removing it would make it more versatile

8mm Mauser is default rimless, but has a rimmed version

It's clear they could make a rimless 54R if they wanted to

They are only using it still because the current weapons they are fielding have not changed and still use it. 54R is a decent cartridge but much like 30.06 its just not ideal for many uses anymore and is showing its age so redesigning weapons already in use or new weapons to use a new rimless version is just counter productive. Why spend the money updating tech over 100 years old instead of something that would be an improvement?

>>31822167
>the rim limits the cartridge's use
Not for the guns that use it, genius.

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>>31821400
Switching to just rimless version of 7.62x54R doesn't provide enough improvements to warrant such change. USSR developed new machinegun/rifle ammo in the 80s with much more performance overall than 7.62x54R but fall off USSR postponed this project.

>>31822234
What the heck is that?

>>31822234
What's with the extra groove? Some kind of headspacing aid?

>>31822244
http://www.thefirearmblog.com/blog/2016/08/21/modern-intermediate-full-power-calibers-019-russian-6x49mm-unified/

>>31822194
This
>Fuckhuge rim provide more reliable extracting for the MGs that use it
>Also has no impact on performance for the DMRs that use it
>Spend shitloads of time and money replacing it for ??????

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>>31821400

How long is it going to stay in service?

I'll give it another hundred years

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>>31822234
>>31822254
I too want to know why theres a groove

>>31822278
Until the end of the universe

>>31822278
Yup, it would take some kind of MASSIVE improvement in ammo to replace 7.62x54r. I'm talking rimless ammunition becoming a thing. That, or maybe a new type of powder that's SO powerful that rifle rounds are brought down to the size of 7.62x25, intermediate cartridges are the size of .22lr, and pistol cartridges are the size of .22 short.

As for laser/blaster rifles or 'rail guns' whatever that is (projectiles propelled by magnets?), I can't see that replacing firearms anytime soon. Seriously, I wouldn't be surprised if by the time we all die, firearms have not advanced much farther than where they are now. I mean, firearms haven't changed much since the 1950s save for polymer and rails showing up all over the place. Better optics too, I guess. Improvements in batteries have helped.

>>31822556
Fucking derp.

I meant CASELESS! Rimless ammo, of course, is already very much a thing, but not THAT MUCH of an advantage over rimmed ammunition. An advantage, yes, but not a MASSIVE one. Smaller magazines or larger capacity in teh same-size mag (P14 has 5 .303 but M1917 has 6), not to mention rimlock (though that's not something to be overly worried about), but ultimately being stuck with rimmed ammo isn't that bad.

Having a tube mag that can only be reloaded one round at a time instead of a box mag that can be reloaded by clips? Now THAT is something worth worrying about.

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>>31822286
Ribbed for your pleasure

>>31822278
Spess Russians will be purging xenos with it for at least another millenium

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>>31822286
"The 6x49mm seems nuts until you see its competition: That’s the 10x54mmR heavy flechette round that was also designed for the Unified project, on the right. Note the groove in the body of the case on the 6mm – this was designed to help the steel case expand without failing, a critical design feature in a round as high pressure as this one."

straight from the link

>>31822234
I would suck Putin's dick to have a rifle that fired that and a few thousand rounds

>>31822767
Why does the case need to expand? If high pressure calibers need one of these, then why don't rounds such as .50bmg have this indented ring?

>>31823140
Because .50bmg is a brass case that expands normally this is a steel case that does not.

>>31821400
I swear we have this. thread once a month.
Basically this >>31821415
It works, it's versatile, and it'd be super expensive to retool everything that already uses it.

>>31823147
fucking Russians and their steel case obsession

>>31821400
Bc how do you expect it to stay in the chamber without a rim

>>31822581
>>31822556
>Yup, it would take some kind of MASSIVE improvement in ammo to replace 7.62x54r. I'm talking rimless ammunition becoming a thing.

I laughed for a good 20 seconds

>>31823310
Same way other rimless cartridges stay in the chamber

>>31823255
hey man, its keeps my shit cheap so i don't mind.

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>>31821400
They still put the rim on it so the kebabs and kulaks don't load the rifle backwards and shoot themselves in the head.

>>31823379
cheap ammo is crap ammo

>>31823453
A good gun will eat any ammo

>>31823476
by that logic, the Mosin-Nagant is a good gun

>>31823484

when the gun is literally less than a hundred dollars who cares?

>>31822167
Isn't the 8x57mmR a sporting cartridge only like the .307 Winchester (the rimmed version of the .308 win) is a sporting cartridge only?

>>31821400
because 308 already exists and is in use

>>31823569
a quality gun is a quality gun, regardless of price

>>31823626
>implying Russia uses a Western cartridge

>>31823638
>Implying that they don't

>>31823140
Steel cased .30-06 comes with a similar groove.

>>31824006
>implying they'd use an American capitalist cartridge

>>31823615
Yes, exactly.
>>31823638
They do and have done for years. Russia also uses 9x19 (a German cartridge, now NATO standard), 9,3x64 Brenneke (A German hunting cartridge), and .338 Lapua Mag (a Finnish-American cartridge).

>>31824042
>Implying there isn't a uber secret spec ops team somewhere in the RF that has a 7.62x51mm DMR laying somewhere

>>31823569
>when the gun is literally less than a hundred dollars
>less than a hundred dollars
>a hundred dollars
whoa grandpa how were the good ol' days, please let me know

>>31823484
A good gun will eat any ammo.
However a gun which eats any ammo is not necessarily a good gun.
How can you not get this concept through your thick head?

>>31821400
Because it's rimed for her pleasure

Russia's economy isn't that great, and they don't have the resources to retool everything they have just to get rid of the rim. For rifles that require a full length rifle cartridge but not rimmed, they use 7.62 NATO. Those are mainly niche situations limited to their special operations forces.

>>31824625

lol

>>31823484
https://www.youtube.com/watch?v=a-CTa2lMGN0

>>31823140
Also muzzle energy =\= chamber pressure. 50BMG is rated for pressures similar to 5.56

>>31821400
Because they have a bunch of PKMs

>>31823334
Glad to hear it. God knows what the future will hold if rimless ammunition becomes a thing. Who knows what battlefields will be like in the future...